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Do different things each week that can be educational. For one, you could feature a student and do a write-up on them, always making sure you include kids that don't fit your diversity message, otherwise it is useless. Just a one page interview with a pic and post it on bulletin boards. This will instill pride in a lot and many will read and want to be interviewed. Other things you can do is have events maybe once a month, like a meet and greet.